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Old 02-17-2018, 11:56 AM   #1
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Air Tank Making a Strange Noise

My rear air tank is making a strange noise, like there's an air leak.

Here's a video.



I checked the pressure protection valves, tank drain, and other fittings for leaks, but they are air tight. I can put my head up next to it and it doesn't sound any louder from one side or the other.

Any ideas?
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Old 02-17-2018, 01:20 PM   #2
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I feel like a doofus. After an hour of poking, spraying and listening at the tank I checked the other end of the hoses coming out of the tank. I found a leak at the right rear ride height valve where the plastic tube went into the tee fitting that supplies the air to the air bags on that side. It wasn't making noise at that end, but I guess I could hear the air passing through the pressure protection valve.
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Old 02-19-2018, 08:47 AM   #3
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Dennis, I was under the rear section of our coach last week and it was also making a loud whistling noise. I had pumped up the air bags all the way to work on the shock mount and the rear air tank was making a loud noise. I crawled around under there but could not find the source and had to focus on the shock mount.
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Old 02-19-2018, 09:21 AM   #4
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Quote:
Originally Posted by vito.a View Post
Dennis, I was under the rear section of our coach last week and it was also making a loud whistling noise. I had pumped up the air bags all the way to work on the shock mount and the rear air tank was making a loud noise. I crawled around under there but could not find the source and had to focus on the shock mount.
I found the leak by pressing on the 1/4 inch tube going into the ride height valve. When I put a certain amount of pressure on it, the noise in the tank stopped. I could wiggle the tube back and forth hear air escaping the valve and the noise in the tank came back.
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